Comment 2 for bug 1339308

Hhhmmm, the caching should now work correctly, but there are at least one critical issue: The fit-to-something scale modes can lead to continuous adjustments because the crop box updates the apparent size of the pages which then can change the crop box...

Not sure how to prevent this, for one thing one could make the crop box independent of the current transformation and calculate it only once. But the necessary adjustments when changing the transformations together with tiling seem quite complicated to me...